1225023996540 has 48 divisors (see below), whose sum is σ = 3430207001088. Its totient is φ = 326659750464.

The previous prime is 1225023996529. The next prime is 1225023996541. The reversal of 1225023996540 is 456993205221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225023996540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225023996541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114729 + ... + 1921631.

It is an arithmetic number, because the mean of its divisors is an integer number (71462645856).

Almost surely, 2^{1225023996540} is an apocalyptic number.

1225023996540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225023996540 is an abundant number, since it is smaller than the sum of its proper divisors (2205183004548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225023996540 is a wasteful number, since it uses less digits than its factorization.

1225023996540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832218 (or 832216 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 1225023996540 in words is "one trillion, two hundred twenty-five billion, twenty-three million, nine hundred ninety-six thousand, five hundred forty".